hv actual test, of bringing a loaded car safely to 

 rest from full speed, ami in this respect an- unique 

 among elevator safety features of comparatively low 



Cl.st. 



In addition to the safety features already men- 

 tioned, the cars are equipped with double-acting 

 \\cdgc-cluinp ear safeties of Otis construction, which 

 are installed in connection with speed governors, and 

 which are arranged to grip the guide rails securely and 

 bring the car to a safe stop in case, for any reason, 

 the speed of the latter exceeds, by an undue amount, 

 the sjwed for which the apparatus was installed. 

 The operation of the governor in tripping these .safe- 

 ties also opens an electric switch which cuts off the 

 current supply to the motor, and in case of an emer- 

 gency the safeties can also be worked by hand by the 

 operator, by means of a lever provided for that pur- 

 pose in the car. All of the other safety features 

 incidental to a high grade elevator installation, such 

 as (Mitential switches, safety fuses, automatic center- 

 ing feature in connection with the operating switch 

 in the car, emergency switch, etc., are employed in 

 this installation, and these, together with the sim- 

 plicity of the installation and the economy of space, 

 resulting from the location of the machine over the 

 hatchway, together with many refinements which have 

 been worked out in the details of the equipment, 

 have resulted in apparatus which gives remarkable 

 demonstrations of the excellence of the type. 



All the elevators, with the exception of the sidewalk 

 lifts, will be used for passenger service. The short 

 rise drum type elevator is used for augmenting the 

 service on occasion from the 35th to the 38th floor, 

 I icing designed for intercommunication between the 

 Singer Company offices, and is of the Standard Otis 

 Worm Gear Electric Type. The hydraulic plunger 

 sidewalk elevators are used for the usual basement 

 freight service, and are operated from a pumping 

 plant and tank system installed especially for this 

 service. 



The demands made upon elevator ropes have 

 been constantly increasing until, in the large buildings 

 of the present day, the ropes used 

 must be practically perfect in ma- 

 terial and construction. In the Singer Building, the 

 requirements of strength, speed and, above all, safety, 

 brought forth the desire for a rope as nearly perfect 

 in every way as could be produced. 



The ropes were ordered by the Otis Company 

 from the John A. liocbling's Sons Co., the oldest 

 and largest individual wire rope manufacturers in the 



[48 



WIRE ROPES 



TEMPORARY 

 ELEVATOR 



world, whose factories are situated at Trenton and 

 Uocbling, New Jersey. 



Special stock \\ as .selected, the \\ires were specially 

 drawn, and particular care was given to the laying 

 up of the wires and strands into rope. 



The result is a scries of ropes as nearly perfect in 

 all details as can be manufactured by the most mod- 

 ern methods. 



One interesting feature in connection with the 

 elevator installation was the temporary elevator Used 

 for carrying the workmen and the 

 less bulky materials. When the 

 steel work had reached a sufficient 

 height a traction machine was installed, with ;i 

 car running to the 10th floor. Later, the machine, 

 which was located over the shaft, was raised so 

 that the ear ran successively to the Kith, 21sl. -JIMli. 

 32d and 39th floors. These changes were each made 

 in minimum time, usually over Sunday, so that there 

 was practically no interruption of elevator service to 

 the highest point in the building which it was practi- 

 cable to reach. The use of a highspeed elevator for 

 temporary service in a building in course of erec- 

 tion was a novelty, but it worked out verv success- 

 fully. 



Finally, it may be said that the traction type, 

 unique among elevators, is the logical outcome of 

 the tendency of the day toward the greatest possible 

 simplicity, as resulting in maximum economy and 

 the highest degree of safety, and no one can fail to 

 be impressed with the feeling of solidity and sub- 

 stantiality which is, to a remarkable degree, the sen- 

 sation of the passenger in one of the Singer Build- 

 ing elevators. 



ELEVATOR AUXILIARIES AND ELECTRIC 

 TIME RECORDERS 



ELECTRIC 

 LIGHT SIGNALS 



WITH the advent of high buildings requiring a 

 large number of elevators, the question of the best 

 elevator service for handling people 

 quickly, pleasantly and economic- 

 ally is of the utmost importance. 

 The earlier forms of elevator service comprised 

 a separate set of buttons for each elevator for signal- 

 ing to the operators of the respective ears, also a 

 mechanical indicating device on the elevator en- 

 closure which showed the position and the direction 

 of the travel of the car in transit. Such equipments 



